CVE-2026-82266Public exploitNetwork attack vectorHinoki check available

Unauthenticated superuser access via disabled Admin API authentication

Published Aug 28, 2026 · Updated Aug 28, 2026

Missing authentication in the Redpanda Admin API through 26.2.2 allows remote attackers to perform superuser operations without credentials. When admin_api_require_auth is false, request_auth.cc marks anonymous requests authenticated and superuser-authorized, while the shipped listener binds to 0.0.0.0:9644. Network reachability to port 9644 is the only gate; exposed callers can create or delete broker accounts, rewrite cluster configuration, and disrupt partition replication.

CVSS severity9.3
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authentication in the Redpanda Admin API through 26.2.2 allows remote attackers to perform superuser operations without credentials. When admin_api_require_auth is false, request_auth.cc marks anonymous requests authenticated and superuser-authorized, while the shipped listener binds to 0.0.0.0:9644. Network reachability to port 9644 is the only gate; exposed callers can create or delete broker accounts, rewrite cluster configuration, and disrupt partition replication.

The record

CVE
CVE-2026-82266
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Redpanda Data
Product
Redpanda
Classifications
CWE-306, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=26.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Redpanda Data · Redpandaversion=0 <=26.2.2

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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